If you right click the pill you want to show cumulative data you can select quick table calculation, then running total it may give you what you need. Beyond that I'd need more information on your setup.
To get the most out of the forum (particularly if English isn't a language you're confident in) I STRONGLY recommend including a twbx (Tableau packaged workbook) with your question. Even if you are working with private data it should be quick to mock up something that matches your data structure. You could do this in Excel, or use Superstore or Coffee Chain datasets which are included with Tableau. Not only does this make your question more clear, it will make it a lot easier to demonstrate a solution.